Home / 80,919.52-121,295.05-45,328.66

Finding the Fourth Proportional to 80,919.52, 121,295.05 and 45,328.66

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Solution

The fourth proportional to 80,919.52, 121,295.05 and 45,328.66 is: 67,945.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,919.52 : 121,295.05 = 45,328.66 : x
  2. Step 2: Convert to fraction form
    80,919.52/121,295.05 = 45,328.66/x
  3. Step 3: Cross multiply
    80,919.52x = 121,295.05 × 45,328.66
  4. Step 4: Simplify right side
    80,919.52x = 5,498,142,081.13
  5. Step 5: Solve for x
    x = 5,498,142,081.13/80,919.52
  6. Step 6: Final answer
    x = 67,945.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.